Aluminium reacts with dilute sulphuric acid to form aluminium sulphate and hydrogen gas.
2Al + 3H2SO4 ----> Al2(SO4)3 + 3H2
Aluminium react with hot concentrated sulphuric acid to form aluminium sulphate, sulphur dioxide and hydrogen gas. 2Al + 6H2SO4 ----> Al2(SO4)3 + 3SO2 + 6H2O